Abstract
Many applications, including remote sensing, pollution monitoring, and laser spectroscopy, would benefit from the development of compact, rugged lasers widely tunable around 2000–5000 nm. Presently-available sources of coherent light in this region include difference-frequency mixers, parametric oscillators, Raman cells, lead-salt diode lasers, and various rare-earth lasers. Unfortunately, the nonlinear-optical schemes are complex and often give poor beam quality, and the diode lasers involve cryogenic techniques. We have demonstrated lasing in a new class of materials, Cr2+-doped II–VI compounds. Their tuning ranges should eventually cover at least the 2100–3000-nm region, and efficient pumping with diode lasers is anticipated.
© 1995 Optical Society of America
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